The name of the test used when performing the AT Reverse Munchkins to test if your head is tilted at an angle to avoid being in front of the anus. Powder is put on top of anus to test. If she farts and you avoid all the powder, then you're tilted at the perfect angle, but if the fart leaves a mohawk of powder in your head then you need repositioning.

I did the AT Mohawk Test before doing the AT Reverse Munchkins on her to test if I had the perfect angle.